pyridine; 4-(N,N-dimethlyamino)pyridine in dichloromethane T=0 - 20°C;

in dichloromethane T=20°C; Alkaline conditions;

2,2,6,6-tetramethyl-piperidine-N-oxyl; dimethylsulfide; oxygen; copper(I) bromide dimethylsulfide complex; 6,6'-bis(C8F17(CH2)4)-2,2'-bipyridine in chlorobenzene T=90°C;

oxygen; 2,2,6,6-tetramethyl-piperidine-N-oxyl; copper(I) bromide dimethylsulfide complex; bis(3-(perfluorooctyl)butyl)-2,2'-bipyridine in chlorobenzene T=90°C; Oxidation; 3 h;